There are, so tradition says, four main reasons for a ghost to appear to mortals: to reproach, to warn, to recall and to advise.
I could add a few more: to annoy, to obstruct or, in Billy Joe’s case, to seriously piss off.

Leah had been my first real friend. As I child I was painfully shy, I wouldn’t talk to anyone other than my parents. Then one day in the second grade Leah decided she’d be friends with me. I didn’t get a vote on the matter. For weeks, she’d hold one sided conversations with me as I stared silently at my desk. Finally, I started talking back figuring she wouldn’t shut up unless I spoke.

Today hereis a quote fromThe Darkest Craving, the tenth book of the Lords of the Underworld series, by Gena Showalter.

Red sprang into the princess’s eyes, her expression hardening. “Say something like that again, and I’ll cut out your tongue while you’re sleeping.”
No longer peering at her, Kane reached out blindly and patted her on top of the head. “I’d probably be scared if you actually knew how to keep your promises.”